<!DOCTYPE html>
<meta charset="utf-8">
<title>Test reference</title>
<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">
<style>
.wrap {
  font-size: 2em;
  border: solid black;
  margin: 5px;
  width: 30ch;
  word-break: keep-all;
}
.wrap > div {
  width: 0;
}
#ref1 {
  border-color: blue;
}
#ref2 {
  border-color: orange;
}
</style>

<p>Test passes if the black box is identical to either the blue or orange one.

<div id=ref1 class=wrap>
  <div lang=ja>東京へ<wbr>行きましょう。</div>
</div>
<div class=wrap>
  <div lang=ja>東京<wbr>へ<wbr>行きましょう。</div>
</div>
<div id=ref2 class=wrap>
  <div lang=ja>東京<wbr>へ<wbr>行きましょう。</div>
</div>
